how do I add work notes to Catalog Task (sc_task) record with script?

Hello,

I have need to add Work notes to sc_task record via script. (snap below). I am using script below, and I see the entry in the sys_journal_field table, but doesn't show it up on SCTASK record. Not sure what I am missing.

script:

var rec = new GlideRecord('sys_journal_field');
rec.initialize();
rec.setValue('name','sc_task');
rec.setValue('element_id',sysid); // (sys_id of SCTASK0021026)
rec.setValue('element','work_notes');
rec.setValue('value','Manager1 is Notified');
rec.insert();